Is ICD-10-CM code T59.824 billable?

No, T59.824 (Toxic effect of hexamethylene diisocyanate, undetermined) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code T59.824 belong to?

T59.824 belongs to Chapter 19 of the ICD-10-CM tabular list: S00–T88 (Injury, Poisoning and Certain Other Consequences of External Causes).

T59.824Not billable, use a more specific code below

Toxic effect of hexamethylene diisocyanate, undetermined

Under T59.82 Toxic effects of hexamethylene diisocyanate, in Toxic effects of substances chiefly nonmedicinal as to source (T51-T65), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes

3 billable codes under T59.824: none are a CC or MCC; none map to an HCC.

Instructional notes

Also applies, from T59: Toxic effect of other gases, fumes and vapors

These notes sit on T59 and apply to every code under it, including T59.824.

Includes: conditions that are coded here

aerosol propellants

Excludes1: not coded here, use a different code

chlorofluorocarbons (T53.5)

Also applies, from Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

These notes sit on T51-T65 and apply to every code under it, including T59.824.

Excludes1: not coded here, use a different code

contact with and (suspected) exposure to toxic substances (Z77.-)

Use additional code: add a second code for this, listed after this one

code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
personal history of foreign body fully removed (Z87.821)
to identify any retained foreign body, if applicable (Z18.-)

All codes under T59.824

T59.824 can't be used on a claim. Pick a billable code below; grey headings group them.

MS-DRGs

As the principal diagnosis, the billable codes under T59.824 group to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 917 Poisoning and Toxic Effects of Drugs with MCC (1 of 3 codes)
DRG 918 Poisoning and Toxic Effects of Drugs without MCC (1 of 3 codes)
DRG 922 Other Injury, Poisoning and Toxic Effect Diagnoses with MCC (1 of 3 codes)
DRG 923 Other Injury, Poisoning and Toxic Effect Diagnoses without MCC (1 of 3 codes)
DRG 949 Aftercare with CC/MCC (1 of 3 codes)
DRG 950 Aftercare without CC/MCC (1 of 3 codes)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Poisoning

A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include:

Code history

Added in FY2027 (effective October 1, 2026). No changes since.